package org.example.strategy;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class ShardingDBConfig {
    /**
     * 存储数据库位置编号
     */
    private static final List<String> dbPrefixList = new ArrayList<>();

    //配置启⽤那些库的前缀
    static {
        dbPrefixList.add("0");
        dbPrefixList.add("1");
        dbPrefixList.add("a");
    }

    /**
     * 获取随机的前缀
     *
     * @return
     */
    public static String getRandomDBPrefix(String code) {

        int hashCode = code.hashCode();

        int index =  Math.abs(hashCode) % dbPrefixList.size();

        return dbPrefixList.get(index);
    }
}
